return to home page Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Calculated > Energy > Optimized > Energy

All results from a given calculation for CH2Br2 (dibromomethane)

using model chemistry: B3LYPultrafine/6-31G**

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C2V 1A1
Energy calculated at B3LYPultrafine/6-31G**
 hartrees
Energy at 0K-5182.716264
Energy at 298.15K 
HF Energy-5182.716264
Nuclear repulsion energy348.667538
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at B3LYPultrafine/6-31G**
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A1 3150 3027 2.48 87.54 0.08 0.15
2 A1 1447 1391 0.45 13.24 0.73 0.85
3 A1 573 551 5.06 14.26 0.09 0.16
4 A1 173 166 0.07 4.88 0.43 0.61
5 A2 1118 1074 0.00 7.26 0.75 0.86
6 B1 3246 3119 0.55 55.08 0.75 0.86
7 B1 806 775 4.58 2.54 0.75 0.86
8 B2 1220 1173 74.33 1.18 0.75 0.86
9 B2 618 594 105.80 5.12 0.75 0.86

Unscaled Zero Point Vibrational Energy (zpe) 6176.5 cm-1
Scaled (by 0.9608) Zero Point Vibrational Energy (zpe) 5934.4 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at B3LYPultrafine/6-31G**
ABC
0.86380 0.04008 0.03859

See section I.F.4 to change rotational constant units
Geometric Data calculated at B3LYPultrafine/6-31G**

Point Group is C2v

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 0.000 0.000 0.946
H2 -0.903 0.000 1.547
H3 0.903 0.000 1.547
Br4 0.000 1.629 -0.125
Br5 0.000 -1.629 -0.125

Atom - Atom Distances (Å)
  C1 H2 H3 Br4 Br5
C11.08481.08481.94981.9498
H21.08481.80632.50322.5032
H31.08481.80632.50322.5032
Br41.94982.50322.50323.2585
Br51.94982.50322.50323.2585

picture of dibromomethane state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
H2 C1 H3 112.723 H2 C1 Br4 107.717
H2 C1 Br5 107.717 H3 C1 Br4 107.717
H3 C1 Br5 107.717 Br4 C1 Br5 113.355
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability
Charges from optimized geometry at B3LYPultrafine/6-31G** Charges (e)
Number Element Mulliken CHELPG AIM ESP
1 C -0.227      
2 H 0.193      
3 H 0.193      
4 Br -0.079      
5 Br -0.079      


Electric dipole moments
Electric dipole components in Debye
(What's a Debye? See section VII.A.3)
  x y z Total
  0.000 0.000 1.548 1.548
CHELPG        
AIM        
ESP        


Electric Quadrupole moment
Quadrupole components in D Å
Primitive
 xyz
x -42.672 0.000 0.000
y 0.000 -43.923 0.000
z 0.000 0.000 -40.104
Traceless
 xyz
x -0.658 0.000 0.000
y 0.000 -2.534 0.000
z 0.000 0.000 3.193
Polar
3z2-r26.385
x2-y21.251
xy0.000
xz0.000
yz0.000


Polarizabilities
Components of the polarizability tensor.
Units are Å3 (Angstrom cubed)
Change units.
  x y z
x 4.588 0.000 0.000
y 0.000 9.227 0.000
z 0.000 0.000 5.436


<r2> (average value of r2) Å2
<r2> 225.075
(<r2>)1/2 15.002